340155891 has 6 divisors (see below), whose sum is σ = 491336300. Its totient is φ = 226770588.

The previous prime is 340155859. The next prime is 340155923. The reversal of 340155891 is 198551043.

It is an interprime number because it is at equal distance from previous prime (340155859) and next prime (340155923).

It is not a de Polignac number, because 340155891 - 2⁵ = 340155859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340155821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18897541 + ... + 18897558.

Almost surely, 2^340155891 is an apocalyptic number.

340155891 is a deficient number, since it is larger than the sum of its proper divisors (151180409).

340155891 is a wasteful number, since it uses less digits than its factorization.

340155891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37795105 (or 37795102 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 340155891 is about 18443.3156184022. The cubic root of 340155891 is about 698.0598595911.

The spelling of 340155891 in words is "three hundred forty million, one hundred fifty-five thousand, eight hundred ninety-one".